import time
import random


def nonce(i2):
    string_buffer = []
    for i3 in range(i2):
        string_buffer.append(
            "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"[random.randint(0, 61)])

    return string_buffer


def timestamp():
    l = str(int(time.time()))
    return l


i2 = 16
print(''.join(nonce(i2)))

# print(timestamp())
